Relay box is an operational device to tripping and closing of breaker instructed by protection, breaker controlling unit, monitor unit, and auxiliary device of breaker.
操作箱的作用是用来完成保护、断控单元、测控单元、断路器辅助装置对断路器跳合闸操作的装置。
The authors introduce the troubles inspection methods of the manual control switch, speed control switch, gas-pressure control switch and relay box of electromagnetic retarders used in Yutong coaches.
介绍宇通客车电涡流缓速器手控开关、速度控制开关、气压控制开关、继电器盒等故障的检测方法。
Control electric box or circuit board with contactor, relay, or triac that switches to the compressor.
要切换到压缩机，可以通过电流接触器开关，继电器或者双向可控硅来控制电流盒或者电路板。
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